Invention Grant
- Patent Title: Two-temperature trimming for a voltage reference with reduced quiescent current
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Application No.: US17464261Application Date: 2021-09-01
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Publication No.: US11598795B1Publication Date: 2023-03-07
- Inventor: Rajat Chauhan , Sandeep Shylaja Krishnan , Joseph Alan Sankman
- Applicant: Texas Instruments Incorporated
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent Ray A. King; Frank D. Cimino
- Main IPC: H03F3/45
- IPC: H03F3/45 ; G01R19/22

Abstract:
In an example method of trimming a voltage reference circuit, the method includes: setting the circuit to a first temperature; trimming a first resistor (RDEGEN) of a differential amplifier stage of the circuit; and trimming a first resistor (R1) of a scaling amplifier stage of the circuit. The trimming equalizes current flow through the differential amplifier stage and the scaling amplifier stage. The method includes: trimming a second resistor (R2) of the scaling amplifier stage to set an output voltage of the circuit to a target voltage at the first temperature; setting the circuit to a second temperature; and trimming a second resistor (RPTAT) of the differential amplifier stage, a third resistor (R1PTAT) of the scaling amplifier stage, and a fourth resistor (R2PTAT) of the scaling amplifier stage to set the output voltage of the circuit to the target voltage at the second temperature.
Public/Granted literature
- US20230046592A1 TWO-TEMPERATURE TRIMMING FOR A VOLTAGE REFERENCE WITH REDUCED QUIESCENT CURRENT Public/Granted day:2023-02-16
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